Name of a data collection (e.g., project name) this data belongs to

mlqso slit	s_xel1
flashheros	s_xel1
RASS	s_xel1
mlqso	s_xel1
mlqso	s_xel2
mlqso slit	s_xel2
RASS	s_xel2
flashheros	s_xel2